Steam 64 Api.dll -

Antivirus software (including Windows Defender) often flags steam_64_api.dll as a false positive. Why? Because hackers use DLL injection to cheat in multiplayer games. Antivirus software sees a DLL trying to inject code into a game process and panics, quarantining or deleting the file instantly.

If you actually bought the game on Steam and see this error, Steam will fix it. steam 64 api.dll